Perhaps you should try some spelling variations:
income based » outcome based, home based, genome based
gender labor » gendered labour, border labor, gender laws
based saul » based fault, based small, based soil
wang hong » wang yong, wang hyoung, wang lihong
chun yi » chun hui, chun wai
chun i » chun _, chun h, chun hui

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: wang hong ((chun i) OR (chun yi)) ((gender labor) OR (gender law)) income based saul ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hong ((chun i) or (chun yi)) ((gender labor) OR (gender law)) income based saul ;~".
• Adding a wildcard symbol may retrieve word variants: wang hong ((chun i) or (chun yi)) ((gender labor) OR (gender law)) income based saul ;*.